I don't know of a specific university that uses the iPad as a recording device, but I can't imagine that is not one. The iPad has had a revolutionary effect on the field of education. Educators and teachers alike are using them in new and exciting ways. And with the advent of the iPad 2, education has become even more reliant on its abilities. So, I can't imagine that this practice is not happening.

Sorry I don't have a specific answer for you, but here are a couple of articles that might be of interest to you: